Question

Which process plays an important role in the gaseous exchange between cells?

Answer 1

Hint: Plants obtain the gases they need through the leaves. They need oxygen for the process of respiration and carbon dioxide for the process of photosynthesis. The gases diffuse into the intercellular spaces through the minute pores which are found underneath the leaf which is known as stomata.

Complete step by step answer: The process which plays an important role in the gaseous exchange between cells is diffusion. It is the movement of substances or material from a high concentrated area to a low concentrated area. It is a very important process in which carbon dioxide from the stomata diffuses into the leaves and finally into the cells. There is a major two types of diffusion that occurs in plants:
a.Simple diffusion - It is a process by which solutes move along a concentration gradient in a solution or across a semipermeable membrane.
b.Facilitated diffusion - It is a passive movement of molecules that involves transport proteins.
There are certain factors on which diffusion depends; they are diffusion pressure gradient, temperature and density. The importance of diffusion in plants are as follows:
1. Exchange of gases occurs through the process of diffusion.
2. Transpiration occurs with the help of diffusion.
3. The ions are absorbed via diffusion.
4. The food material is translocated by this process.
5. Diffusion keeps the internal walls of the plants moist.
6. Aroma of the plants is due to the diffusion of the aromatic compounds to attract insects.

Note: Diffusion is the tendency of molecules to spread out in order to occupy available space. Gasses and molecules in a liquid have a tendency to diffuse from a more concentrated environment to a less concentrated environment. Passive transport is the diffusion of substances across a membrane. This is a spontaneous process and cellular energy is not expended.